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CN101278404B - Transistor element, display device and these manufacturing methods - Google Patents

Transistor element, display device and these manufacturing methods Download PDF

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Publication number
CN101278404B
CN101278404B CN2006800368229A CN200680036822A CN101278404B CN 101278404 B CN101278404 B CN 101278404B CN 2006800368229 A CN2006800368229 A CN 2006800368229A CN 200680036822 A CN200680036822 A CN 200680036822A CN 101278404 B CN101278404 B CN 101278404B
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interlayer dielectric
transistor
organic
transistor unit
unit
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CN101278404A (en
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荒海麻由佳
川岛伊久卫
村上明繁
山贺匠
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Ricoh Co Ltd
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Ricoh Co Ltd
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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K19/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic element specially adapted for rectifying, amplifying, oscillating or switching, covered by group H10K10/00
    • H10K19/10—Integrated devices, or assemblies of multiple devices, comprising at least one organic element specially adapted for rectifying, amplifying, oscillating or switching, covered by group H10K10/00 comprising field-effect transistors
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K10/00—Organic devices specially adapted for rectifying, amplifying, oscillating or switching; Organic capacitors or resistors having potential barriers
    • H10K10/40—Organic transistors
    • H10K10/46—Field-effect transistors, e.g. organic thin-film transistors [OTFT]
    • H10K10/462—Insulated gate field-effect transistors [IGFETs]
    • H10K10/468—Insulated gate field-effect transistors [IGFETs] characterised by the gate dielectrics
    • H10K10/478—Insulated gate field-effect transistors [IGFETs] characterised by the gate dielectrics the gate dielectric comprising a layer of composite material comprising interpenetrating or embedded materials, e.g. TiO2 particles in a polymer matrix
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K10/00—Organic devices specially adapted for rectifying, amplifying, oscillating or switching; Organic capacitors or resistors having potential barriers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/10—Organic polymers or oligomers
    • H10K85/111—Organic polymers or oligomers comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Nonlinear Science (AREA)
  • Composite Materials (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Mathematical Physics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Thin Film Transistor (AREA)

Abstract

A transistor element that a transistor using an organic semiconductor layer on a substrate, an insulating film between layers contacting the organic semiconductor layer and an upper electrode electrically contacting the transistor via a through hole provided in the insulating film between layers are layered, wherein the insulating film between layers comprises a mixture of organic materials and particles.

Description

Transistor unit, display unit and their manufacture method
Technical field
Present invention relates in general to transistor unit.Especially, the present invention relates to the component structure for the stabilized driving transistor unit, this transistor unit has via interlayer dielectric and is connected to the organic semi-conductor upper electrode.
Background technology
Replace being used for conventional transistorized inorganic material such as silicon single crystal and amorphous silicon, carried out using the transistorized exploitation of organic semiconducting materials recently.Compare with the situation of using inorganic material, because its manufacture method is easily simple and large tracts of land stratification at low temperatures, therefore use the organic semi-conductor transistor to have cheaply advantage.Because the flexibility of organic material might form flexible plastic substrates, therefore for using the organic semi-conductor transistor, expected its application and development, for example comprise the driving element of the various electronic installations of display unit.
In the transistor of the organic semiconductor layer that use the is arranged in two-dimensional array situation as the active-matrix substrate that drives display unit etc., for example, need to form the structure that is provided with via the upper electrode of interlayer dielectric and described organic semiconductor layer electric connection.As interlayer dielectric, usually, use and utilize sputtering method and CVD (chemical vapour deposition (CVD)) to form method such as the inorganic material of silica and silicon nitride.Yet problem is to have many steps and makes transistorized deterioration in characteristics owing to forming through hole in these vacuum technologies.
And, for the transistor unit with structure shown in Figure 1, owing to interlayer dielectric is set as gate insulating film and because upper electrode is arranged on the organic semi-conductor opposite side with the described interlayer dielectric unnecessary passage of formations in described organic semiconductor layer that is clipped in the middle, therefore has the problem of turn-off current (OFF-current) increase.For example, reported the result's (referring to non-patent literature 1) who makes the QVGA electrophoretic display apparatus at the flexible base, board that uses organic transistor.Be in the situation of positive voltage at gate voltage, by from just to the negative current potentials that changes pixel electrode (pixel electrode) turn-off current being increased.Open in non-patent literature 1: even the electric capacity of the interlayer dielectric of transistor formed element is about 1/20 of gate insulating film, because the impact of pixel electrode still produces second channel in organic semiconductor, however not mentioned its solution.
On the other hand, disclose many above shown in the organic transistor element of structure, but most relevant with the improvement of gate insulating film.Wherein, the dielectric film (interlayer dielectric) about the side at the non-grid dielectric film of active layer arranges for example, uses to comprise that the material of aromatic compounds and/or aromatic ring composition polymer is as interlayer dielectric.By like this, realized the cost degradation of solution-treated and disclose the organic field effect tube (for example, referring to patent documentation 1) that can improve the organic transistor mobility.Yet, do not have the description about formation through hole and upper electrode, so it does not have to solve top problem.
The unevenness that provides more than the 5nm at the interface of interlayer dielectric and semiconductor film and be not more than 40nm is provided provides leakage current wherein to be suppressed and the transistorized technology (for example, referring to patent documentation 2) of working stability.Comprise the interlayer dielectric of inorganic material for formation, this technology is by using hydrogen plasma to make unevenness; So, form polysilicon active layer.
The technology that OTFT is provided is also disclosed, in this OTFT, control more electric current and it is flowed away by double-grid structure, this double-grid structure comprise on the active layer of organic semiconductor layer and under have a pair of gate insulating film and gate electrode.(for example, referring to patent documentation 3) by applying the control voltage synchronous with upper gate electrode and bottom gate electrode, can transport more electric current, so that form passage near the up and down gate electrode in active layer respectively in the transistor of this structure.This technology has been utilized and formed the multichannel fact in active layer; On the other hand, when each gate voltage in the transistor that can't fully control double-grid structure, its hint can form unnecessary passage described in non-patent literature 1.
In addition, disclose the structure of thin-layer transistor, in this thin-layer transistor, the TFT of photoelectric device comprises top light shield layer and bottom light shield layer, and by improving light fastness and display quality in the intersection region that passage area is arranged on data wire and scan line.(for example, referring to patent documentation 4) in addition, discloses semiconductor device, and wherein this semiconductor device comprises gate electrode, gate insulating film and the source/drain electrode that forms at substrate successively; Be filled in the organic semiconductor between source/drain electrode; And dielectric film, its form with its on source/drain electrode Surface Contact.(for example, referring to patent documentation 5)
Patent documentation 1:JP 2005-101555, A
Patent documentation 2:JP 2004-247434, A
Patent documentation 3:JP 2005-079549, A
Patent documentation 4:JP 2004-126557, A
Patent documentation 5:JP 2005-223049, A
Non-patent literature 1:SID 05 DIGEST 3.1:Invited Paper:Rollable QVGAActive-Matrix Displays Based on Organic Electronics, G.H.Gelinck, H.E.Huitema, M.van Mil, E.van Veenendaal, P.J.G.van Lieshout and F.J.Touwslager, Polymer Vision/Philips Research Laboratories, Eindhoven, TheNetherlands
Summary of the invention
In the structure of transistor unit shown in Figure 1, by upper electrode is arranged on the opposite side relative with organic semiconductor layer described interlayer dielectric is clipped in the middle, thus, this voltage will be applied to described upper electrode when applying source/drain voltage.As a result, as mentioned above, problem is to work by making as the upper electrode of gate electrode with as the interlayer dielectric of gate insulating film, and forms unnecessary passage in organic semiconductor layer.When forming passage under the transistorized off-state (off-state) in organic semiconductor layer, the turn-off current increase causes ON/OFF (ON/OFF) more deteriorated than reduction and transistor characteristic.Therefore, this becomes serious problem.As this way to solve the problem, suppose to form the interlayer dielectric that is difficult to serve as gate insulator.That is, with to require gate insulating film to have an excellent properties opposite, think that dielectric constant should be low, thickness should be large, and with the interface of organic semiconductor layer should be uneven.Yet, in fact, also do not have method to form the interlayer dielectric that satisfies above-mentioned condition that has through hole and do not cause the transistor infringement.
Overall purpose of the present invention is to address the above problem.That is, overall purpose of the present invention provides to have and forms the transistor unit that technique is not damaged transistorized interlayer dielectric and do not form unnecessary passage in organic semiconductor.The present invention more specifically purpose is to provide transistor unit, the interlayer dielectric that wherein consists of by the mixture that uses by organic material and particle is difficult to form unnecessary passage in organic semiconductor, and manufacture method is simple, does not make transistor characteristic deteriorated.In addition, overall purpose of the present invention provides the display unit of the described transistor unit of use and their manufacture method.
The result, for be laminated with substrate use organic semiconductor layer transistor, contact the interlayer dielectric of this organic semiconductor layer and via interlayer dielectric in the element of the upper electrode that electrically contacts of the through hole that arranges and described transistor, the interlayer dielectric that consists of by the mixture that uses by organic material and particle, acquisition can realize the transistor unit of above-mentioned purpose, so finish the present invention.
For achieving the above object, according to an aspect of the present invention, a kind of transistor unit is provided, it is laminated with: substrate use organic semiconductor layer transistor, contact the interlayer dielectric of this organic semiconductor layer and via interlayer dielectric in the upper electrode that electrically contacts of the through hole that arranges and described transistor, wherein said interlayer dielectric comprises the mixture of organic material and particle.
According to the present invention, for be laminated with substrate use organic semiconductor layer transistor, contact the interlayer dielectric of this organic semiconductor layer and via interlayer dielectric in the element of the upper electrode that electrically contacts of the through hole that arranges and described transistor, by the interlayer dielectric that the mixture by organic material and particle consists of, the transistor unit that is difficult in described organic semiconductor layer, to form unnecessary passage and might obtains to have excellent ON/OFF ratio.In addition, by this transistor unit is combined with the image-displaying member that is selected from liquid crystal display cells, electrophoretic display device and organic electro-luminescent display unit, display unit can be provided, this display unit has good performance, thin and lightweight, burden to human eye is little, and is plate or flexible.
By the following detailed description, other objects, features and advantages of the present invention will become more obvious.
Description of drawings
Fig. 1 is the basic structure that shows organic transistor element;
Fig. 2 is the figure that shows that the inorganic particle particle diameter distributes;
Fig. 3 is the figure that shows transistorized Cr and ON/OFF ratio thereof, C in this transistor IFilm thickness and the relative dielectric constant of the interlayer dielectric by changing transistor unit of the present invention change;
Fig. 4 is the figure that shows the structure of transistor unit of the present invention, and wherein (A) is its sectional view and (B) be its plane graph;
Fig. 5 is the figure that shows passage forming section of the present invention;
Fig. 6 is the figure that shows display unit of the present invention;
Fig. 7 is the figure of evaluation result that shows the transistor performance of embodiment 1;
Fig. 8 is the figure of evaluation result of the transistor performance of display comparison example 1; With
Fig. 9 is the figure of evaluation result that shows the transistor performance of embodiment 2.
Embodiment
Next, with reference to accompanying drawing, provide the description of embodiment of the present invention.The invention is not restricted to concrete disclosed execution mode, and can change in the case without departing from the scope of the present invention and change.
The present invention includes following transistor unit stacked: use the transistor of organic semiconductor layer, the interlayer dielectric that contacts with described organic semiconductor layer at substrate, the upper electrode that is electrically connected with described transistor via the through hole that in described interlayer dielectric, arranges, wherein said interlayer dielectric is made of the mixture of organic material and particle, and in described organic semiconductor layer, be difficult to form unnecessary passage, and described transistor unit might have excellent ON/OFF ratio.
At first, describe the structure of interlayer dielectric, this interlayer dielectric comprises the mixture of described interlayer dielectric and organic material and particle.
The particle that comprises in the mixture of the interlayer dielectric that consists of transistor unit of the present invention can be for can be used as organic granular or the inorganic particle that particle exists after forming described interlayer dielectric.In fact, the preferred use has controllable grain size and do not dissolve in medium but the inorganic particle that disperses.Below, use inorganic particle to describe the present invention as described particle.
The basic structure that in Fig. 1, shows organic transistor element.Forming successively gate electrode, gate insulating film and source/drain electrode on the substrate and organic semiconducting materials is being filled between source/drain electrode to form organic semiconductor layer.In addition, form the interlayer dielectric and the upper electrode that cover described organic semiconductor layer and source/drain electrode, transistor part and the upper electrode through hole electric connection by in described interlayer dielectric, arranging.
Use the mixture of organic material and inorganic material might be suppressed at the unnecessary passage of formation in the described organic semiconductor layer as the interlayer dielectric with transistor unit of this structure.This is because have the interlayer dielectric that is dispersed in the inorganic particle in the organic material by use, becomes coarse with the interface of described organic semiconductor layer.Because with the interface roughness of described organic semiconductor layer, the field effect that the current potentials of described upper electrode causes is difficult to have an effect and described interlayer dielectric is difficult to serve as gate insulating film.Think that the interface between the interlayer dielectric film and organic semiconductor layer is to comprise what particle formed in the interlayer dielectric of unevenness for about 20nm to 1 μ m among the present invention.
In addition, using above-mentioned material is thickness and the dielectric constant that is easy to control described film as the further effect of interlayer dielectric.When use is dispersed in inorganic particle in the organic material that is dissolved in the medium, for example, can use the typography such as silk-screen printing technique to form film.Therefore, might form interlayer dielectric than the thickness that forms with conventional material.In addition, control easily dielectric constant by the kind of selection material.
Example as the organic material that uses in the present invention has the material that comprises polyvinyl alcohol resin, polyvinyl acetal resin, acrylic resin, ethyl cellulose resin etc.In addition, as the example of inorganic particle, silicon dioxide (SiO is arranged 2), aluminium oxide (Al 2O 3), titanium dioxide (TiO 2), zinc oxide (ZnO), barium titanate (BaTiO 3) etc.Especially, preferably has the material of relatively low dielectric constant, for example silicon dioxide, aluminium oxide and zinc oxide.In addition, described material can be the inorganic porous particle that has mesopore or micropore in its structure, for example mesoporous silica.
The particle diameter of the inorganic particle that uses in the present invention is 20nm or larger and be not more than 2 μ m.In Fig. 2, shown that the particle diameter of the inorganic particle that uses in the present invention distributes, wherein particle diameter distributes and uses the method such as dynamic light scattering method or laser beam diffraction method to measure.Usually, granular material has particle diameter and distributes, still average diameter (the d of " particle diameter " expression particle 50), that is, diameter (average diameter, d when accumulative total volume frequency becomes 50% in the particle diameter distribution that provides is provided " particle diameter " used in this application 50).When described particle diameter too hour, be difficult to described particle is dispersed in the organic material, therefore described particle diameter is at least 20nm or larger, more preferably described particle diameter is 40nm or larger.In addition, when described particle diameter was too large, described dielectric film became unbalanced, and therefore described particle diameter is chosen as half that is not more than described film thickness; More preferably described particle diameter is not more than 1/5 of described film thickness.Preferably, described particle diameter is not more than 2 μ m, and more preferably described particle diameter is not more than 1 μ m.As inorganic particle, can use a kind of material or can mix as required the multiple material with different compositions or particle diameter distribution.
In addition, do not limit the blending ratio of organic material and inorganic material, but for blending ratio, preferably the ratio of organic material is higher than the ratio of inorganic material, thereby provides flexible for described interlayer dielectric.The volume of preferred organic material be described layer insulation membrane volume 30% or more; More preferably be higher than 50%.The interface roughness of described organic semiconductor layer and described interlayer dielectric is determined by particle diameter and the combination ratio of used inorganic particle.Therefore, according to the formation method of imagination and the thickness of described film, can select suitable material and combination ratio.
The thickness that is used for interlayer dielectric of the present invention is 2 μ m or larger and be not more than 40 μ m.By making described interlayer dielectric thickening have the effect that electric capacity is diminished.Therefore, preferably this thickness is 2 μ m, and 4 μ m or larger more preferably.In addition, as the formation method of interlayer dielectric of the present invention, be suitable such as the typography of silk screen printing and intaglio printing.The scope of the thickness range of interlayer dielectric of the present invention for being suitable for being formed by printing process.For example, when using silk screen printing to form the fine pattern of imagining among the present invention, can be that 15-50 μ m and percent opening are that the pulpous state material of the silk screen supply of 40-60% forms film by covering by linear diameter.Therefore, the thickness of described interlayer dielectric can be stabilized in the top scope and can form through hole.
Gate insulating film is 3 or higher with the per unit area capacity ratio that is used for interlayer dielectric of the present invention.Therefore, certainly can prevent from described organic semiconductor layer, forming unnecessary passage.
Usually, the electric capacity of following definition interlayer dielectric is placed on upper-lower position with the manufacturing electrode with the lamelliform sample, and can use conventional LCR to measure instrumentation amount electric capacity.
C＝εoεrS/d
C: electric capacity [F], ε o: the dielectric constant in the vacuum [F/m], ε r: relative dielectric constant [-], S: area [m 2], d: film thickness [m]
Therefore, per unit area electric capacity is C=ε o ε r/d, and it is the function of relative dielectric constant and film thickness.Here, as the per unit area capacity ratio (Cr) of give a definition gate insulating film and interlayer dielectric.
Cr＝C G/C I
C I: the per unit area electric capacity of described interlayer dielectric, C G: the per unit area electric capacity of described gate insulating film.
In the superincumbent non-patent literature 1, the electric capacity of described interlayer dielectric almost be described gate insulating film electric capacity 1/20.That is, Cr value defined above almost is 20, but increases by the turn-off current that affects of pixel electrode.
Here, show that in Fig. 3 transistorized Cr and its ON/OFF are than (flowing through the On current of source/drain electrode and the ratio of turn-off current), C in this transistor IChange by relative dielectric constant and the film thickness that changes interlayer dielectric of the present invention.When Cr was 3.1, the ON/OFF ratio was 4.5 * 10 4(element among the following embodiment 1).Yet when Cr was worth less than this, ON/OFF was than sharply descending.When Cr was 2.5, the ON/OFF ratio was 7.2 * 10 3, reduced by an order of magnitude, and good transistor performance be not provided.That is, increased turn-off current by in organic semiconductor layer, forming unnecessary passage.Therefore, for the transistor unit that uses interlayer dielectric of the present invention, when Cr value at least 3 or when larger, be difficult to the unnecessary passage of formation in organic semiconductor layer.Therefore, can prevent the increase of turn-off current.Preferred Cr value is 10 or larger.
As example of the present invention, use electric impedance analyzer 4194A (Hewlett Packard) when applying voltage with 1kHz, to measure electric capacity, and calculate relative dielectric constant.
In addition, as shown in Figure 4, it is the effective ways of realizing the object of the invention that upper electrode is placed on the position of seeing the passage forming section that does not cover organic semiconductor layer from plane graph.(especially, referring to plane graph Fig. 4 (B).) described passage forming section refer to the source electrode of described organic semiconductor layer and the drain electrode between part, as shown in Figure 5.By applying voltage to gate electrode, near the gate insulating film of described passage forming section, form passage, and electric current flows through between source electrode and drain electrode.On the other hand, when voltage is applied to described upper electrode, near the interlayer dielectric of described passage forming section, form passage, and the situation that exists unnecessary electric current to flow through.
The meaning of the present invention is, upper electrode is placed on when applying voltage, field effect can not affect by interlayer dielectric the position of organic semiconductor passage forming section, and, organic semiconductor layer is placed on the position of from plane graph, seeing between the upper electrode adjacent one another are.Therefore, part upper electrode cover part organic semiconductor layer only.
For conventional transistor (for example, referring to patent documentation 4), exist and to avoid channel part is arranged on structure under the upper electrode, and have the labyrinth that photomask is set at the upper and lower sides of active layer, incide the generation of the light leak electric current on the active layer to prevent light.Yet for the present invention, dielectric film is made by the mixture of organic material and inorganic material, so that light is in the at the interface scattering of described organic material and inorganic particle.In addition, because thickness is large, light is difficult to be incident on the organic semiconductor layer.Therefore, for the transistor simple in structure without photomask, can realize the object of the invention by the position that upper electrode is placed on the passage forming section that does not cover organic semiconductor layer.
In addition, because by in the material of interlayer dielectric, comprising light absorption pigment composition (coloringredient), can absorb the light that is incident on the interlayer dielectric, and prevent that described light from inciding on the organic semiconductor layer, thereby can effectively suppress the generation of light leak electric current.For the kind of employed pigment composition, to the insulating material of particle diameter between about 20nm-2 μ m without limits, and can use conventional known natural pigment composition or synthetic dyestuff composition.
The general structure of transistor unit of the present invention then, is described.
Insulated substrate can be a kind of in insulating resin substrate, glass substrate, semiconductor substrate and the ceramic substrate, but is not limited to a kind of in these, and in the situation of the display unit of using transistor unit of the present invention, preferred described insulated substrate is resin substrate.For employed resin material, for example have, thermoplastic resin is such as styrenic, Styrene-Butadiene, styrene-acrylonitrile copolymer, styrene-maleic acid copolymer, acrylic copolymer, the styrene-propene acid copolymer, polyethylene, vinyl-vinyl acetate copolymer, the hydrochloric acid polyethylene, polyvinyl chloride, polypropylene, vinyl chloride vinyl acetate copolymer, the polyesterols acid resin, polyamide, polyimides, polyurethane, Merlon, poly-allylat thing (polyallylate), polysulfones, diallyl phthalate ester resin, ketone resin, polyvinyl butyral resin, polyether resin and mylar; The cross-linked thermal set resin is such as organic silicones, epoxy resin, phenolic resins, Lauxite, melmac etc.; And light-cured resin, such as epoxy acrylate, carbamate-acrylate etc.Consider that from the angle of thermal endurance and moisture resistance polyimides is preferred, and SE-1180 (Nissan-kagaku) and AL3046 (JSR) are the examples of commodity.
Gate electrode is made by electric conducting material, and this electric conducting material is such as but not limited to, the alloy of platinum, gold, silver, nickel, chromium, copper, iron, tin, antimony, lead, tantalum, indium, palladium, tellurium, rhenium, iridium, aluminium, ruthenium, germanium, molybdenum, tungsten and these metals; Can use antimony tin, tin indium oxide (ITO), indium zinc oxide (IZO), the zinc oxide that fluorine mixes, zinc, carbon, graphite, vitreous carbon, silver slurry and carbon paper slurry (carbon paperpaste), lithium, lithium fluoride, beryllium, potassium, calcium, scandium, titanium, manganese, zirconium, gallium, niobium, sodium, sodium-potassium-sodium alloy, magnesium, magnesium/copper mixture, magnesium/silver-colored mixture, magnesium/aluminium mixture, magnesium/indium mixture, aluminium/alumina mixture, lithium/aluminium mixture or these stacked materials.Especially, wherein, consider that from aerial stability platinum, gold, silver, copper, aluminium, indium, ITO, IZO and carbon are preferred.
In addition, the heating and melting adherend (heated and fusion-bonded body) of conductive particle can be used for gate electrode.As conductive particle, example has average grain diameter (diameter) to be the metallic particles of 1-50nm, and preferably, average grain diameter is platinum, gold, silver, copper, cobalt, chromium, iridium, nickel, palladium, molybdenum, the tungsten of 1-10nm.
In addition, can use material with carbon element, such as conductive black, carbon nano-tube and ball carbon (C60, C70).
Film thickness for example, preferably, is arranged on 100nm between the 1000nm with gate insulating film between 10nm and 1000nm; Can use insulating material and these materials to can be insulating material scope interior organic material and inorganic material.As organic material, for example, polychlorostyrene pyrene, PETG, polyformaldehyde, polyvinyl chloride, polyvinylidene fluoride, cyano ethyl amylopectin, polymethyl methacrylate, polysulfones, Merlon, polyimides, polyethylene, polyester, polyvinylphenol, melmac, phenolic resins, fluorine resin, polyphenylene sulfide, Parylene and polyacrylonitrile are arranged.In addition, as inorganic material, silica, silicon nitride, aluminium oxide, aluminium nitride, titanium oxide and silicon nitrogen oxide (silicon nitride oxide) are for example arranged.In addition, various insulation L B films (Langmuir-Blodgett film) all can be used for gate insulating film.This film is not limited to these materials; Can use in these materials two kinds mixture, and comprise that the dielectric film of different materials can be with two-layer or more than two-layer formation.
In described insulating material, consider that from relative dielectric constant silicon nitride, aluminium oxide, aluminium nitride, titanium oxide and silicon nitrogen oxide are preferred.The relative dielectric constant of whole gate insulating film increases and suppressor grid leakage current more.And insulating material can be according to the improvement of gate electrode bonding strength is selected.
Do not limit the formation method of gate insulating film; CVD method, plasma CVD method, plasma polymerization method, vacuum deposition method, sputtering method, spin-coating method, dip coating, ion beam evaporation and L-B method are for example arranged; The whole bag of tricks all can use.
Source/drain electrode spatially is separated from each other, so that relative with the gate electrode of gate insulating film opposite side.For example, grid vertically between 1 μ m and 1000 μ m, grid laterally between 5 μ m and 4000 μ m, and the longitudinal pitch of two source/drain electrode grids is arranged in the scope of 0.01 μ m and 1000 μ m.Yet, can source/drain electrode be set according to transistorized structure.
In addition, preferably the film thickness of source/drain electrode is arranged in the scope between 10nm and the 200nm, but can film thickness be set according to structure.
The material that is used for source/drain electrode can be the material identical with above-mentioned gate electrode.In addition, can use dissolving or be dispersed in electric conducting material in organic solvent or the water.Because this electric conducting material can be used as the coating coating, compare with the vacuum technology of for example vacuum deposition method and can reduce manufacturing cost.
As for the dissolving that is used for source/drain electrode or be dispersed in organic solvent or the electric conducting material of water, silver-colored slurry, gold paste, copper slurry are for example arranged and in organic solvent, be dispersed with polymeric blends and the conduction organic material of conductive particle (such as graphite).
Since following some, compare with metal material, the organic material that will conduct electricity for source/drain electrode be preferred.That is, when electrode material was metal, the interfacial tension between the organic substance of metal and organic semiconductor layer was large.Therefore, report that the arrangement of the organic molecule of near interface is interfered, and form the trap site of charge carrier, so that element characteristic variation (J.Wang, D.J.Gundlach, C.C.Kuo, and T.N.Jackson, 41 StElectronic Materials Conference Digest, p.16, June 1999).Thus, coat electrode material and can reduce interfacial tension by conducting electricity organic material, and can prevent the deterioration of element characteristic.
As this conduction organic material, the large molecule of conjugated system for example polyacetylene, polypyrrole, polythiophene, polyphenyl, poly-to styrene, polythiophene ethene, polyfuloleine, polyacene, poly-furans and their derivative are for example arranged.In addition, can mix and use the suitable dopant that closes of appointing with high conductivity.As for dopant, consider the poly-sulfonic acid, Polystyrene Sulronate, naphthalene sulfonic acids or the alkyl naphthalene sulfonic acid that preferably use steam wherein to force down from the dispersion stabilization solution.In addition, dissolving or the electric conducting material that is dispersed in organic solvent or the water can be used for gate electrode.
And, dissolving or the commercial examples that is dispersed in the electric conducting material in organic solvent or the water are PerfectGold (trade mark) (gold pastes, SinkuYakin), Perfect Copper (copper slurry, SinkuJigane), OrgaconPaste Variant 1/4 (printing transparent PEDOT/PSS printing ink, Nippon Agfa Gewalt), PasteVariant 1/3 (printing transparent PEDOT/PSS printing ink, Nippon Agfa Gewalt), Orgacon CarbonPaste Variant 2/2 (carbon electrode slurry, Nippon Agfa Gewalt), BAYTRON (trade mark) P (PEDT/PSS solution, Nippon Stalk Vitech).
In addition, preferably will form the electrode material of ohmic contact for source/drain electrode material with organic semiconductor layer.Can reduce the energy barrier between source/drain electrode and the organic semiconductor layer.Particularly, when will be wherein charge carrier be that the p-type semiconductor in hole is when being used for organic semiconductor layer, preferred electrode materials work content (energy difference of vacuum level and Fermi level) for example has gold (5.1eV), platinum (5.65eV), iridium (5.27eV), palladium (5.12eV), nickel (5.15eV), tin indium oxide (ITO) and zinc oxide (ZnO) greater than the electrode material of organic semiconductor layer work content.In addition, when n-type semiconductor is used for organic semiconductor layer, preferred work content is less than the electrode material of organic semiconductor layer, alkaline-earth metal is for example arranged, such as magnesium (3.66eV), barium (2.7eV), gallium (4.2eV), indium (4.12eV), aluminium (4.28eV) and silver (4.26eV).Herein, the numeric representation work content in the bracket.Particularly, can use the I-E characteristic of the display unit of transistor unit of the present invention to select the combination of source/drain electrode material and organic semiconductor layer material by reference, thereby reduce the resistance at these material contact surface places.
In addition, two source/drain electrodes can comprise the material that has each other different work contents.When will be wherein charge carrier be the p-type semiconductor in hole when being used for organic semiconductor layer, select so that in the work content of drain electrode material described in two the source/drain electrodes work content less than described source electrode material.Thus, when applying the source electrode to the negative voltage of drain electrode, produce in the same direction electrical potential difference, and can reduce the voltage that the voltage as source electrode and drain electrode applies.For example, gold is used for drain electrode for the source electrode and with silver.In addition, when n-type semiconductor is used for organic semiconductor layer, can replace with the material of source electrode the material of drain electrode.
As for the manufacture method that forms gate electrode and source/drain electrode, useful known photoetching process, lift-off method are made these electrode patterns and the method for depositing electrically conductive film on above-mentioned electric conducting material with evaporation or sputtering method; Use in addition hot transfer printing or ink-jet to form photoetching agent pattern in the metal forming of for example aluminium or copper, thereby use etching to form the method for electrode.In addition, in conducting polymer liquid or dispersion, the conductive particle dispersion is sprayed with direct ink discharge device, and can form electrode.And, can use photoetching process or laser ablation method to adopt and comprise that the electrically conductive ink of carbon black, conducting polymer and conductive particle or the coated film patterning that conductive paste makes coating form electrode.In addition, can use the printing process such as letterpress, intaglio printing, lithographic printing and silk screen printing to utilize electrically conductive ink or conductive paste patterning to form electrode.
The cross section of demonstration source/drain electrode in Fig. 1 and 4; In addition, they can be taper and any other shape.
As for the material of organic semiconductor layer, can use known organic semiconducting materials.Especially, for manufacturing operation and manufacturing cost, the preferred organic semiconducting materials such as organic low molecular, organic polymer and organic oligomer that can be used as the coating coating that uses.As organic low molecular and organic oligomer material, anthracene, aphthacene, pentacene, acene, the molecular material that comprises their substitutive derivative, metal phthalocyanine, thiophene oligomers and derivative thereof, ball carbon C60 and carbon nano-tube and derivative thereof are for example arranged.Usually, with the stacked low molecular material such as pentacene of vapour plating method, but also can use the people such as J.E.Anthonyra Org.Lett.Vol.4 p.15 in (2002) and the people such as P.T.Herwig at Adv.Mater.Vol.11, p.480 the method for describing in (1999) wherein utilizes chemical change to form the pentacene film after using pentacene precursor Coating.
And, as for high-molecular organic material, use the electron conjugated macromolecule of π type and the electron conjugated macromolecule of σ type and their derivative.As for the electron conjugated macromolecule of π type, for example have polyphenyl, polyacetylene, polypyrrole, polythiophene, poly-furans, poly-selenophen, polyaniline,
Figure S2006800368229D00121
, poly-pyrene, poly-fluorenes, poly-to styrene, polythiophene ethene, paracoumarone, polyphenyl bithiophene, poly-indoles, polycarbazole, polyoxy fluorenes, polyisothianaphthene, poly-different naphthalene thiophene, poly-diacetylene, polyphenylene sulfide and polyphenylene oxide.And, can use DNA (deoxyribonucleic acid) (DNA) as biomaterial.Can use the charge transfer complex that comprises electron acceptor and electron donor.And, as the example of electron acceptor, 2,3-, two chloro-5 are arranged, 6-dicyano-p-benzo benzoquinones, 2,5-dimethyl four cyano quinone bismethane and four cyano benzene bismethane.As the example of electron donor, dibenzo tetrathiafulvalene, four selenium fulvalenes, tetrathiafulvalene, four sulphur aphthacenes and tetramethyl tetrathiafulvalene are arranged.Above-mentioned organic semiconducting materials uses or is dispersed in the adhesive resin as the mixture of multiple these materials and uses.
As for the organic semiconductor layer material, can use the macromolecule organic semiconducting materials with high carrier density and the mixture with low molecule organic semiconducting materials of low carrier density.The drain electrode turn-off current reduces, and can avoid the reduction of carrier mobility.Example with macromolecule organic semiconducting materials of high carrier density is poly-fluorene derivative, and the example with low molecule organic semiconducting materials of low carrier density is butadiene derivatives or aromatic uncle amine derivative as the electric charge generating material.
Formation method as for organic semiconductor layer, there are for example spraying process, spin-coating method, scraper for coating method, immersion liquid rubbing method, the tape casting, rolling method, rod to be coated with the rubbing method of method, die coating method (die coat method), silk screen print method and LB method, vacuum deposition method, the molecule epitaxial growth method, ion cluster bundle method (ioncluster beam method), low energy ion beam method, ion plating, the CVD method, sputtering method, plasma polymerization method, electrolysis polymerization method and chemical polymerization.Can be according to these methods of materials'use of organic semiconductor layer.
The surface configuration of organic semiconductor layer is not limited to the convex surface that shows among Fig. 4 and Fig. 5, and it can form with the shape with the coating excellence of the bonding excellence of interlayer dielectric and interlayer dielectric.
As shown in Figures 4 and 5, two source/drain electrodes only partly contact organic semiconductor layer, and their major part exposes.Therefore, transistor unit of the present invention has the structure that interlayer dielectric wherein forms the exposed surface of contact organic semiconductor layer and source/drain electrode.Thus, prevent electric current from electrode surface via the flowing of organic semiconductor layer, suppress the drain electrode turn-off current, and these help to improve the ON/OFF ratio.
Interlayer dielectric with transistor unit effect of the present invention has the characteristic that is suppressed at the unnecessary passage of formation in the organic semiconductor layer, and as above-mentioned formation interlayer dielectric.
An example of the display unit of use transistor unit of the present invention as shown in Figure 4 is shown in Figure 6.Use transistor unit of the present invention as switch element (also being called control element), thus the show state of control image-displaying member.For example, on substrate, form a plurality of transistor units of the present invention (active-matrix substrate) with clathrate; Can also form the display unit with transistor unit, this transistor unit is as the switch element corresponding with a plurality of image-displaying members that form.Therefore, for image-displaying member stacked on the active-matrix substrate of transistor unit of the present invention is being set, can use for example method of liquid crystal, electrophoresis and organic electroluminescent.
Fig. 6 shows the typical structure of display unit, wherein stacks gradually image-displaying member and second substrate at the transistor unit of the present invention shown in Fig. 4 (A).Can be used for second substrate with glass with such as the plastics of polyester, Merlon, poly-allylat thing, polyester and sulfone.
Because use liquid crystal to provide power as the liquid crystal display cells of image-displaying member by electric field, its energy consumption is little, and because driving voltage is low, can improve the driving frequency of TFT; Therefore liquid crystal display cells can be suitable for large-sized monitor.About the display packing of liquid crystal cell, TN, STN, guest/principal mode and PDLC (PDLC) are for example arranged; Especially, PDLC is preferred, because brilliant white indication that can the cremasteric reflex type.By with the combination of liquid crystal display cells and transistor of the present invention, can provide have superperformance, thin and lightweight planar display.
And, iknsulating liquid and the electrophoretic display device that is dispersed in the charged particle in this iknsulating liquid can be used as image-displaying member.Described electrophoretic display device comprises dispersion, and the particle that will have the first color (for example, white) in this dispersion is dispersed in the painted dispersion with second color.In this painted dispersion, because the effect of electric field, the position with particle of the first color can change, and this particle is charged in described painted dispersion, the color change that presents thus.According to this display packing, can provide the display that becomes clear and have wide visual angle.In addition, the angle that particularly consumes from energy is considered the preferred electrophoresis element that uses, so that the demonstration storage characteristics to be provided.
By this dispersion being made the microcapsules with large molecular film parcel, stablized display performance, and made the production of display unit become easy.Available known method, for example core cellvation method, situ aggregation method and interfacial polymerization form microcapsules.Especially, preferably titanium oxide is used for white particle, and carry out as required surface treatment or with other combination of materials.About dispersion, can preferably use the organic solvent with high resistivity, such as benzene,toluene,xylene, aromatic hydrocarbon, alicyclic for example, hexane, cyclohexane, kerosene, aliphatic hydrocarbon, for example chain methane series hydrocarbon, trichloroethylene, tetrachloro-ethylene, trichlorine PVF, halogenated hydrocarbons, for example bromoethane, fluorine ether compound, fluorine ester compounds and silicone oil.In order to make dispersion painted, use the oil-soluble dyes with required absorption characteristic, for example anthraquinone or azo-compound.Surfactant can be added described dispersion to stablize this dispersion.
Since human eye is not almost born, therefore can be by providing the display unit with superperformance with transistor unit of the present invention and electrophoretic display device combination.Described electrophoretic display device is to have low driving electric power and the image-displaying member of high-contrast.Therefore, can have superperformance by the combination of described electrophoretic display device and transistor of the present invention is provided, thin and lightweight planar display.
Because organic electroluminescent device is emissive type, the panchromatic demonstration that therefore can become clear.In addition, because organic electroluminescent device has very thin organic layer, so it has high flexible and be suitable for forming at flexible base, board.Therefore, can have superperformance and be flexible thin and lightweight display unit by the combination of electroluminescent cell and transistor of the present invention is provided.
And, about the display unit of transistor unit and use transistor unit of the present invention, because its manufacture method is identical with known manufacture method, the explanation of therefore omitting these methods.Yet, be characterised in that interlayer dielectric comprises that the transistor unit of the present invention of mixture of organic material and inorganic material is different from conventional method on manufacture method.Preferably form interlayer dielectric with silk screen print method.For the conventional method that forms through hole after forming interlayer dielectric, problem is to open the etch process infringement transistor in hole.Yet, when using silk screen print method, owing to can form film in the zone except via regions in advance, therefore do not damage transistor.And, in the effective utilization that has realized material and simple process, can realize purpose of the present invention.
Embodiment
Below, more specifically explain the present invention by the following example, but the invention is not restricted to the following example.
Embodiment 1
By Nano Silver printing ink being formed predetermined pattern and uses dry the processing to form gate electrode at the carbonic ester substrate with ink-jet method.Then, by spin-coating method coated heat aggretion type polyimides, and at 190 ℃ it is heat-treated the formation gate insulating film.Formed gate insulating film has 3.6 relative dielectric constant and the film thickness of 0.4 μ m.Through photomask in the source/the drain electrode forming section carries out ultraviolet radiation, carries out thus surfaction (surface reforming).Then, by with ink-jet method Nano Silver printing ink being formed pattern with acquisition source/drain electrode.
Organic semiconducting materials shown in the following formula 1 is dissolved in the dimethylbenzene; Behind printing ink, in the part of needs ink-jet method film forming, make active layer.Thus, obtain organic transistor.Described transistorized passage length is 5 μ m, and channel width is 2000 μ m.
Figure S2006800368229D00151
For interlayer dielectric, be that 0.16 μ m and specific area are 13m with average grain diameter 2The barium titanate of/g (A among Fig. 2) adding is dissolved in polyvinyl acetal resin in the solution of solvent gained, so that its weight ratio becomes 1: 2, and by with roll mill they being mixed with slurry.Use silk screen print method that this insulation paste is transferred on the transistor except via regions, then by dry solvent formation interlayer dielectric.The volume ratio of the Pioloform, polyvinyl acetal of formed interlayer dielectric (partial ratio) is 30%, and thickness is that 11 μ m and relative dielectric constant are 32.
Be shown below, the per unit area capacity ratio of described gate insulating film and interlayer dielectric of the present invention is 3.1.
CG/CI＝(εrG/dG)/(εrI/dI)＝(3.6/0.4)/(32/11)＝3.1
At last, use silk screen print method to form as the silver that comprises Ag particle, acrylic resin and solvent of upper electrode material and starch, and form pixel electrode by dry solvent.On the cushion region of the liner (pad) of gate electrode zone and drain electrode, print with definite shape, so that described pixel electrode material is positioned on the open area of described interlayer dielectric.
Use the analyzing parameters of semiconductor instrument to estimate described transistorized performance.
Measuring condition: VDS=-20V is set, in table 1 and Fig. 7, illustrated 0V (being connected to the source electrode) and-result of upper electrode during 20V (being connected to drain electrode).The longitudinal axis of Fig. 7 (Id) is illustrated in the current value that flows through between source electrode and the drain electrode, and the transverse axis Vg of Fig. 7 represents gate voltage.And, in table 1 On current and turn-off current represent respectively Vg=-20V and+current value during 20V.Referring to Fig. 7, do not find upper electrode be 0V or-turn-off current has large change during 20V.Yet, confirmed that transistor performance is subjected to the influence of electric potential of described upper electrode little.
Table 1
Upper electrode: 0V Upper electrode :-20V
On current [A] VG=-20V 8.6×10 -7 9.8×10 -7
Turn-off current [A] VG=20V 1.8×10 -11 2.2×10 -11
Threshold voltage [V] -1.8 0.3
As a result, the electromotive force of confirmation transistor performance and upper electrode is irrelevant.
(Comparative Examples 1)
Prepared with embodiment 1 in identical organic transistor.
Form afterwards interlayer dielectric forming the thick paraxylene photochopper (dimmer) of 1 μ m by evaporation, and etch open through hole by Ar.Then, with top identical formation upper electrode.
Identical with embodiment 1, in table 2 and Fig. 8, illustrated 0V (being connected to the source electrode) and-evaluation result of transistor performance during 10V (being connected to drain electrode).Identical with Fig. 7, the longitudinal axis of Fig. 8 (Id) is illustrated in the current value that flows through between source electrode and the drain electrode, and the transverse axis Vg of Fig. 8 represents gate voltage.And, in table 2 On current and turn-off current represent respectively Vg=-15V and+current value during 15V.1 result as a comparison case, result are when upper electrode is connected to drain electrode, to have increased turn-off current by forming passage in the areas of disconnection in organic semiconductor (off region).
Table 2
Upper electrode: 0V Upper electrode :-10V
On current [A] VG=-15V 3.5×10 -7 5.6×10 -7
Turn-off current [A] VG=15V 3.2×10 -11 4.8×10 -10
Threshold voltage [V] -0.4 6.5
(embodiment 2)
The organic transistor that preparation is identical with embodiment 1.
For interlayer dielectric, be that 40 μ m and specific area are 80m with average grain diameter 2The silicon dioxide of/g (B among Fig. 2) adding is dissolved in polyvinyl acetal resin in the solution of solvent gained, so that its weight ratio becomes 2: 1, and by with roll mill they being mixed to prepare slurry.Use silk screen print method that this insulation paste is transferred on the transistor except via regions, then by dry solvent formation interlayer dielectric.The volume ratio of the Pioloform, polyvinyl acetal of formed interlayer dielectric is 51%, and thickness is that 4 μ m and relative dielectric constant are 3.6.
Be shown below, the per unit area capacity ratio of the gate insulating film of this embodiment and interlayer dielectric is 10.
CG/CI＝(εrG/dG)/(εrI/dI)＝(3.6/0.4)/(3.6/4)＝10
Using silk screen print method to form as the silver that comprises Ag particle, acrylic resin and solvent of upper electrode material starches, thereby organic semi-conductor passage forming section is arranged under the gap between the upper electrode, and forms pixel electrode by dry solvent.
Identical with embodiment 1, the evaluation result of the transistor performance that obtains with the analyzing parameters of semiconductor instrument has been shown in table 3 and Fig. 9.Identical with Fig. 7 and Fig. 8, the longitudinal axis of Fig. 9 (Id) is illustrated in the current value that flows through between source electrode and the drain electrode, and the transverse axis Vg of Fig. 9 represents gate voltage.And, in table 3 On current and turn-off current represent respectively Vg=-20V and+current value during 20V.As the result of embodiment 2, confirm that the electromotive force of upper electrode is little on the impact of transistor characteristic, and turn-off current does not increase almost.
Table 3
Upper electrode: 0V Upper electrode :-20V
On current [A] VG=-20V 2.1×10 -6 2.0×10 -6
Turn-off current [A] VG=20V 5.1×10 -11 4.8×10 -11
Threshold voltage [V] 1.7 2.5
As above-mentioned, for the transistor that uses organic semiconductor layer at substrate, contact the interlayer dielectric of this organic semiconductor layer and the element of the upper electrode that electrically contacts via the through hole that in this interlayer dielectric, arranges and this transistor, comprise the interlayer dielectric of organic material and particle by use, the transistor unit that is difficult in described organic semiconductor layer, to form unnecessary passage and might obtains to have excellent ON/OFF ratio.
The invention is not restricted to concrete disclosed execution mode, and can change in the case without departing from the scope of the present invention and change.
The application is based on the Japanese priority application No.2005-290129 that submitted on October 3rd, 2005, at this in conjunction with its full content as a reference.

Claims (15)

1. transistor unit, it comprises:
The use organic semi-conductor transistor that forms at substrate;
That form at this transistor and contact this organic semi-conductor interlayer dielectric; With
That form at this interlayer dielectric and via interlayer dielectric in the upper electrode that electrically contacts of the through hole that arranges and described transistor,
Wherein said interlayer dielectric comprises the inorganic particle that is dispersed in the organic material,
Wherein consist of the organic material of described interlayer dielectric and the mixture of inorganic particle and comprise the light absorption pigment composition.
2. the transistor unit of claim 1, the particle diameter that wherein consists of the inorganic particle of described interlayer dielectric is not more than 1/2 of described layer insulation film thickness.
3. the transistor unit of claim 1, the volume ratio of wherein said organic material and described interlayer dielectric is 30% or more.
4. the transistor unit of claim 1, the thickness of wherein said interlayer dielectric are 2 μ m or larger and be not more than 40 μ m.
5. the transistor unit of claim 1, wherein the per unit area capacity ratio of gate insulating film and described interlayer dielectric is 3 or larger.
6. the transistor unit of claim 1 wherein is placed on described upper electrode the position of seeing the passage forming section that does not cover described organic semiconductor layer from plane graph.
7. display unit, wherein right to use requires 1 transistor unit as the switch element corresponding with image-displaying member.
8. display unit, wherein in each transistor unit on image-displaying member and the active matrix is corresponding stacked, and this active matrix arranges the transistor unit of a plurality of claims 1 with clathrate.
9. the display unit of claim 8, wherein said image-displaying member is selected from liquid crystal cell, electrophoretic display device and organic electroluminescent device.
10. the manufacture method of a transistor unit, this transistor unit comprises: use organic semi-conductor transistor that substrate forms, form at this transistor and contact this organic semi-conductor interlayer dielectric and form at this interlayer dielectric and via interlayer dielectric in the upper electrode that electrically contacts of the through hole that arranges and described transistor, the method comprises the steps:
Formation comprises the interlayer dielectric that is dispersed in the inorganic particle in the organic material,
Wherein consist of the organic material of described interlayer dielectric and the mixture of inorganic particle and comprise the light absorption pigment composition.
11. the manufacture method of the transistor unit of claim 10, the particle diameter that wherein consists of the inorganic particle of described interlayer dielectric is not more than 1/2 of described layer insulation film thickness.
12. the manufacture method of the transistor unit of claim 10, the volume ratio of wherein said organic material and described interlayer dielectric are 30% or larger.
13. the manufacture method of the transistor unit of claim 10, the thickness of wherein said interlayer dielectric are 2 μ m or larger and be not more than 40 μ m.
14. the manufacture method of the transistor unit of claim 10, wherein the per unit area capacity ratio of gate insulating film and described interlayer dielectric is 3 or larger.
15. the manufacture method of the transistor unit of claim 10 wherein is placed on described upper electrode the position of seeing the passage forming section that does not cover described organic semiconductor layer from plane graph.
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KR100754395B1 (en) * 2006-02-10 2007-08-31 삼성전자주식회사 Organic electroluminescent display and manufacturing method thereof

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WO2007043419A9 (en) 2007-06-07
KR100996933B1 (en) 2010-11-29
EP1932183B1 (en) 2014-07-16
KR20080053347A (en) 2008-06-12
EP1932183A1 (en) 2008-06-18
US20090189148A1 (en) 2009-07-30
JP2007103584A (en) 2007-04-19
EP1932183A4 (en) 2010-06-16

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